Structurally-controllable electron-momentum filter based on hybrid ferromagnet, Schottky-metal and semiconductor nanostructure

IF 2.9 3区物理与天体物理 Q3 NANOSCIENCE & NANOTECHNOLOGY Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-05-31 DOI:10.1016/j.physe.2024.116015

Ai-Chuang Ji, Si-Ying Li, Gao-Tuo Cai, Mao-Wang Lu

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Abstract

Half-infinitely-wide ferromagnetic stripe and nanosized Schottky-metal stripe can be experimentally assembled on surface of GaAs/Al_xGa_1-xAs heterostructure, fabricating a hybrid semiconductor nanostructure, which was recently proven to act as an electron-momentum filter (a type of emerging nanoelectronics device). With the help of atomic-layer doping technique, a tunable δ-potential can be intentionally embedded inside the device. Because the inclusion of δ-doping does not clear two-dimensional characteristic of electron motion, an obvious wave vector filtering (WVF) effect still appears. Moreover, the effective potential experienced by electron in the semiconductor nanostructure is closely related to the δ-doping, therefore, a structurally-controllable electron-momentum filter with a tunable WVF efficiency by weight or position of the δ-doping can be obtained for nanoelectronics device applications.

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基于混合铁磁体、肖特基金属和半导体纳米结构的结构可控电子动量滤波器

通过实验，可以在 GaAs/AlxGa1-xAs 异质结构表面组装出半无限宽的铁磁条纹和纳米级肖特基金属条纹，从而制造出一种混合半导体纳米结构，这种结构最近被证明可以用作电子动量滤波器（一种新兴的纳米电子器件）。在原子层掺杂技术的帮助下，可调δ电位可以有意识地嵌入器件内部。由于δ掺杂的加入并不能清除电子运动的二维特性，因此仍然会出现明显的波矢量滤波（WVF）效应。此外，电子在半导体纳米结构中经历的有效电势与δ掺杂密切相关，因此可以获得一种结构可控的电子动量滤波器，通过δ掺杂的重量或位置实现可调的波矢量滤波效率，从而应用于纳米电子器件。

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来源期刊

Physica E-low-dimensional Systems & Nanostructures 物理-纳米科技

CiteScore

7.30

自引率

6.10%

发文量

356

审稿时长

65 days

期刊介绍： Physica E: Low-dimensional systems and nanostructures contains papers and invited review articles on the fundamental and applied aspects of physics in low-dimensional electron systems, in semiconductor heterostructures, oxide interfaces, quantum wells and superlattices, quantum wires and dots, novel quantum states of matter such as topological insulators, and Weyl semimetals. Both theoretical and experimental contributions are invited. Topics suitable for publication in this journal include spin related phenomena, optical and transport properties, many-body effects, integer and fractional quantum Hall effects, quantum spin Hall effect, single electron effects and devices, Majorana fermions, and other novel phenomena. Keywords: • topological insulators/superconductors, majorana fermions, Wyel semimetals; • quantum and neuromorphic computing/quantum information physics and devices based on low dimensional systems; • layered superconductivity, low dimensional systems with superconducting proximity effect; • 2D materials such as transition metal dichalcogenides; • oxide heterostructures including ZnO, SrTiO3 etc; • carbon nanostructures (graphene, carbon nanotubes, diamond NV center, etc.) • quantum wells and superlattices; • quantum Hall effect, quantum spin Hall effect, quantum anomalous Hall effect; • optical- and phonons-related phenomena; • magnetic-semiconductor structures; • charge/spin-, magnon-, skyrmion-, Cooper pair- and majorana fermion- transport and tunneling; • ultra-fast nonlinear optical phenomena; • novel devices and applications (such as high performance sensor, solar cell, etc); • novel growth and fabrication techniques for nanostructures

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